.header {
  position: fixed;
  top: 0;
  width: 100%;
  height: 75px;
  background-color: #fff;
}
.header .logo {
  height: 75px;
  width: 183px;
  background: url(../img/logo.jpg) no-repeat center;
}
.header ul li {
  float: left;
  margin: 0 25px;
  line-height: 75px;
}
.header ul li a {
  font-size: 18px;
  color: #333333;
}
.header ul li .active {
  color: #ffa33b;
}
